Dust-collector.



No. 755,262. PATENTED MAR. 22, 1904.

' J. H WALSH.

DUST COLLECTOR.

Arrucuroiw FILED HAR.15. 1902. no menu.

3 SHEETS-SHEET 1.

No. 755,262. PATENTED MAR. 22, 1904. J. H. WALSH.

DUST COLLECTOR. 7 APPLICATION FILED MAR. 15. 1902. no MODEL. a sums-sumz.

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PATENTED MAR. 22, 1904 J. H. WALSH. DUST COLLECTOR. APPLICATION FILEDjun. 15, 1902.

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Patented March 22,1904.

PATENT OFFICE.

JOHN H. WALSH, OF MASON CITY, NEBRASKA.

DUST-COLLECTOR.

SPECIFICATION forming part of Letters Patent No. 755,262, dated. March22, 1904.

Application filed March 15, 1902. Serial No. 98,348. (No model.) 7

To all whom, it may concern! Be it known that I, JOHN H. WALsH, acitizen of the United States, residing at Mason City, in the county ofCuster and State of Nebraska, have invented certain new and usefulImprovements in Dust-Collectors, of which the following is aSpecification.

This invention relates to that class of dustcollectors in which the dustis forced under pressure against a cloth, the dust remaining on thesurface of the cloth, while the air passes through the same, and at acertain point in the movement of the machine a current of air is forcedthrough the cloth in a direction opposite from that of the main currentto thereby remove the adhering dust from the cloth,

I thus keeping it clean, and thereby providing a maximum of eflic'iency.

My object is to provide a machine of this class that is simple, strong,and inexpensive in construction and, that has a maximum of effectivecloth-surface and occupies a minimum of floor-space.

'A further object is to provide a machine in which the exterior of thecloth is exposed, so that any defects therein may be easily seen,and inWhich the cloth is secured to anumber of independent sections that maybe readilyand easily detached for purposes of repair or replacementwithout afiecting or disturbing the remainder of the machine. r

My object is, further, to provide a machine in which the dust is removedfrom the cloth thoroughly and completely during each revolution by bothstriking the cloth and forcing air through the cloth in an oppositedirection and in confining said reverse air-currents sothat theair-pressure Willall be utilized for the purpose of discharging thedust.

A further object is to provide means Whereby the heavier particles ofdust and small grains are prevented from falling out of the sectionsduring the rotation and are all carried to a point where they may bedropped into a common conveyer, that will discharge them with the dust.

My invention consists in certain details in the construction,arrangement, and combination of the various parts of the machine Wherebythe objects comtemplated are attained, and

made clear.

particularly in the construction of the detachable sections ofclothsurface, the means for confining the reverse pressure of air to onesection and for forcing all of said air through the said section, in theconstruction, arrangement, and combination, with said detachablesections, of the pivoted chutes connected with each section and themeans for operating them, and in the construction, arrangement, andcombination of means for striking upon the section through which theback draft is blow ing, and in certain other details of construc-' tion,arrangement, and combination of parts, as hereinafter more fully setforth, pointed out in my claims, and illustrated in the ac companyingdrawings, in which Figure 1 shows a front elevation of the completemachine, except that a number of the cloth-bearing sections are removed.Fig. 2

shows a vertical central transverse sectional 'I have used thereference-numeral 10 to indicate the supporting legs of the machine.These supporting-legs are attached to the stationary circular framemembers 11, which frame members constitute the ends of the machine. Intoeach of these frame members I have inserted a rectangular air-trunk l2,ter- 3 5 minating at its end a short distance beyond the inner surfaceof the frame member 11, the other ends of the air-trunksbeing designedto communicate, With milling machinery which produces currents ofdust-ladened air. Formed on the outer face of the frame member 11 is araised guide, forming a groove 18, having at one side aninwardly-projecting portion 14 and at its top a downwardly-projectingportion at 15 for purposes hereinafter These frame members areconnected'with each other and firmly braced by means of theconnecting-rods 16, passed through the frame members to thereby holdthem together, and these rods are provided I with pipes or tubes 17,whereby the frame members are spaced apart. Directly above theair-trunks is a screw-conveyer trough 18, extending from one end to theother inside of the machine-frame and discharging into adownwardly-extending trough 19,which discharges at one end of themachine. Mounted within this trough 18 is a screw conveyer 20, soarranged as to convey substances within the trough from both ends towardthe central discharge-trough 19. The ends of the shaft of the screwconveyer project through the frame member, and the pulleys 21 areattached to its ends, and near each end of said shaft is mounted a Wiper22 for purposes hereinafter made clear.

Rotatably mounted upon each of the frame members is a circular rim 23,and these rims are connected so that they are rotated in unison by meansof a large number of shafts 24,

the ends of which are mounted in the rims.

Fixed to the central portion of each shaft 24 is a chute 25, open at itsouter and inner ends and tapered so as to be smallest at its inner end,and fixed to each end of each shaft 24 is a lever 26, having at itsouter end an inclined surface 27 and having at-its inner end aninwardly-projecting roller 28, these rollers 28 being designed to enterthe cam-groove 13. As will hereinafter appear, the rims 23 are made torotate in unison around the stationary cam-groove 13, and by reason ofthe peculiar construction of said groove the chutes 25 have their inneropen ends pointed substantially toward the central portion of themachine throughout the lower half of their movement, and throughout theupper half of their movement the inner open ends thereof stand at ornear a vertical line, so that the contents of the chute will bedischarged into the interior of the machine when at the upper half oftheir movement, and when these chutes reach the central top portion oftheir movement the levers 26 at the ends of the shaft 24: assumevertical positions on account of the part 15 of the groove 13, and theinner end of the chute projects straight downwardly, so that thecontents of the chute are discharged into the trough 18.

The reference-numeral 29 indicates lugs formed on or fixed to the innerface of each of the rims 23 to provide a support to which thecloth-bearing sections may be attached.

These sections are constructed as follows:.

Referring to the drawings, it will be seen that each cloth-bearingsection is composed of two end pieces 30, having at their lower ends twocross-strips 31 and at their upper ends four cross-strips 32, and midwaybetween the strips 31 and 32 are three cross-strips 33, V-shaped,

in cross-section. The numeral 3 1 indicates a strip of cloth one end ofwhich is attached to one of the cross-pieces 31. From this point thecloth passes over the first of the cross- 5 pieces 32, then down to thetop of the first cross-piece 33, then over the second one of thecross-pieces 32, then down to the top of the second cross-piece 33, thendown on top of the last cross-piece 33, then over the fourth cross-piece32, and the other edge of the strip is attached to the other one of thecross pieces 31. This forms a frame which is inclosed completely by thecloth strip, except between the cross-pieces 31. In the complete machineI have provided one of these clothbearing sections for each of thechutes 25. In the accompanying drawings only three of thesecloth-bearing sections are shown, and they are attached to the rotatablerims 23 by having their ends between the rims 23 and being attached tothe lugs, 29. Obviously these cloth bearing sections may be easily andquickly removed, and any one may be removed without disturbing theothers.

I have provided for each of the chutes 25 a flexible strip 35, whichstrips are attached to the outer edge of the chutes and also to theinner faces of the cross-pieces 31, so that the chutes may tilt to alimited degree relative to the cloth-bearing sections, and yet no dustor air may pass between the outer edges of the chutes and the inneredges of the strips 31.

I have provided means for propelling the rims carrying the cloth-bearingsections in such a manner that each cloth-bearing section will, when itreaches a position where its chute 25 is directly above the trough 18,stop and be held for a short period of time before passing beyond thetrough 18, as follows: Formed on each of the shafts 24 is a roller 36 toproject beyond the lever 26 and to be directly in the path of the lever22. The shaft of the screw conveyer is constantly rotated by means ofone or both of the pulleys 21, and obviously during this rotation theend of the lever 22 will strike the roller 36 and carry it a shortdistance before the lever 22 passes below the roller 36. WVhen the endof the lever does pass below the roller, the rotary rims andcloth-bearing sections will, of course, stop until the opposite lever 22engages the next one of the rollers 36, and during this interval thedust contained in the uppermost clothbearing section is made to dropthrough the chute 25 into the trough 18 and be conveyed by the screwconveyer 20 to a point of discharge, and as soon as this has been donethe next cloth-bearing section is broughtinto position above the trough18 by means of the lever 22.

I shall next describe the means by which the dust in the cloth-bearingsections is made to drop into the trough 18.

The numeral 37 is used to indicate a frame comprising ends and a toppiece, which frame is supported directly above the machine by means ofthe braces 38, which are secured to the stationary frame members 11.Contained within the top of the frame 37 is a fan-housing 39, containinga rotary fan 40 on the shaft 1 mer 47 is pivoted. This hammer isprovided with a contractile spring 48, attached to'the v hammer and, tothe arm 46 to exert its force in drawing the hammerdownwardly. Pivotedto the hammer is an arm 49, slidingly supported in the guides 50 on theuprights 51.; This arm 49 is designed to be engaged by the wheel 52,having one or more teeth 53 at one side of its periphery, and when thewheel 52 is rotated the teeth 53 successively engage and elevate the arm49, together with the hammer 47, against the pressure of the spring 48,and when the teeth pass the end of the arm 49 the hammer will be rapidlydropped to engage the knocker 44. This operation will obviously shakethe entire cloth-bearing section very violently each time the hammerdescends. In addition to this the fan 40 will produce aback current ofair to pass from the outer surface of the cloth downwardly through thecloth, thus dislodging the dust that has accumulated on the innersurface of the cloth, and all of this dust will pass into the trough l8and be discharged. The said wheel 52 is fixed to a shaft 52*, which maybe rotated by any suitable means, and this shaft is provided with apulley 52*, connected by a .belt 52 with the pulley 42 of the fan 40. v

I have also provided means whereby the chutes 25 will be tilted from adownwardlyinclined position at their inner ends to an upwardly-inclinedposition near the center of their upward movement, as follows: Thenumeral 54 indicates an arm fixed to the frame member 11, and this armhas a roller 55on the inner surface of its outer ends, which roller isin position to engage the inclined ends 27 of the levers 26. As will beseen by referring to Fig. l of the drawings, the levers 26 will as theystart on their upward move- 7 ment incline downwardly at their innerends,

and when the rollers on the ends of the levers 26 reach the part 14 ofthe groove 13 the roller 55. will engage the inclined surface 27 of thelever. This will tend to retard the outer end of the lever and permitthe inner end to move upwardly, so that when the levers pass the part 14they will incline upwardly instead of downwardly, and then when therollers 26 enter the part 15 of the grooves 13 they will assume astraight vertical position.

In practical use and assuming that a current of dust-laden air is passedthrough the terior of the machine or to air-trunks, it is obvious thatthis air will pass outwardly through all of the cloth-bearing sections,except the one protected by the frame at the top, leaving the dust onthe inner surfaceof the cloth. It frequently happens that small grainsand other solid substances will be forced through the air-trunks, andthese of course will drop into the lower cloth-covered sections. Thenafter the chutes connected with each cloth-bearing section approach thetop portion of their movement these chutes areturned, by means of theeccentric groove and the levers working therein, to such position thatthe chutes will hold any grain or solid substances. that may droprfromthe cloth-bearing section downwardly,and-the said chutes will carry suchsubstances ,until the chute is turned to a Vertical position, it will bedirectly above the trough 18. It has been previously explained how thecloth-bearing sections are rotated and stopped for a short space of timedirectly over the trough 18, and when in this position all of the solidsubstances contained in the section will drop by gravity into thetrough, and in addition to this a current of air is forced by the fanfrom the outer surface of the cloth into the interior of thecloth-bearing section and at the sametime the cloth bearing section isviolently shaken by the knocker, so that all of the dust in thecloth-bearing section is dropped into the trough 18 and carried away, asbefore explained. For purposes of repair or replacement it is obviousthat any one of the clothbearing sections may be quickly and easilyremoved, so that access may be had to the inthe other sections of thesame.

Having thus described my invention, what I claim, and desire to secureby Letters Patent of the United States therefor, is

1. In a'dust-collector, the combinationof two stationary disks, eachhaving a camgroove, a rotatable side plate on each of said open at itsinner and outer ends, a flexible,

strip connecting the sides of the chutes and the filter-sections, shaftsfixed to the chutes and crank-arms on the shafts, rollers on thecrankiarms to enter the grooves in the stationary disks and means forreceiving and carrying ofi? dust from the uppermost chute, for thepurposes stated.

2. Adust-collector comprising in combination two stationary end pieces,an air trunk for introducing dust-laden air through one of said endpieces, a rim rotatably mounted on each end piece, a series ofcloth-covered filtersections secured to said rims and open at theirinner ends, a chute at the inner end of each section, means for tiltingsaid chutes when at their upper limit of movement to allow the solidcontents thereof to drop and for holding said chutes throughout the restof their rotation in position to prevent solid substance from droppingfrom the section downwardly,a dustconveyer below the uppermost chute, afan above the uppermost filter-section so arranged that the air fromsaid fan must pass through the cloth of the section and means forrotating the rims bearing the filter sections intermittently, for thepurposes stated.

3. A dust-collector, comprising in combination two stationary endpieces, a conveyer for introducing dust-laden air through one of saidend pieces, a rim rotatably mounted on each end piece, a series ofcloth-covered filter-sections secured to said rims and open at theirinner ends, a chute at the inner end of each section, means forinclining the chutes during the rotation of the rims, a dust-conveyerbelow the uppermost chute, a fan above the uppermost filter-section,means for inclosing the uppermost filter-section so that the air fromsaid fan must pass through the cloth of the section, means for rotatingthe rims bearing the filter-sections intermittently, and means forstriking the uppermost filter-section when it is directly above theconveyer, for the purposes stated.

4. An improved dust-collector, comprising in combination two stationaryend pieces, supporting legs attached thereto, two circular rimsrotatably mounted on the end pieces, a number of cloth-coveredfilter-sections mounted upon the rotatable rims and covered on all sidesexcept the side toward the interior of the machine, means fordischarging a current of dust laden air to the interior of the machine,an open-topped trough on the interior of the machine, one of said endpieces having an eccentric groove with an enlarged portion near its top,a shaft mounted in said trough and projected through the end pieces, awiper on the shaft, a screw on the shaft to carry the contents of thetrough to a point of discharge, a chute for each clothcovered filtersection open at its top and bottom, a supporting-shaft for each chute,said shaft having hearings in the rotatable rims, a lever on one end ofeach shaft, a roller on each lever to enter the eccentric groove andanother roller on each lever to be engaged by the wiper on thescrew-shaft and means for driving the screw-shaft.

5. An improved dust-collector, comprising in combination two stationaryend pieces, supporting-legs attached thereto, two circular rimsrotatably mounted on the end pieces, a number of cloth-bearingfilter-sections mounted upon the rotatable rims and covered on all sidesexcept the side toward the interior of the machine, means fordischarging a current of dust-laden air into the interior of themachine, an open-topped trough on the interior of the machine, one ofsaid end pieces having an eccentric groove provided with an enlargedportion near its top, a shaft mounted in said trough and projectingthrough the end pieces, a wiper on one end of said shaft, a screw on theshaft carrying the contents of the trough to a point of discharge, achute open at its top and bottom for each clothbearing filter-section, ashaft for supporting each chute, said shaft having its bearings in therotatable rims, a lever on the end of each of said shafts, a roller oneach of said levers to enter the eccentric groove and another roller oneach of said levers to be engaged by the Wiper on the screw-shaft, meansfor ro-.

in combination two stationary end pieces, supporting-legs attachedthereto, two circular rims rotatably mounted on the end pieces, a numberof cloth-bearing filter-sections mounted upon the rotatable rims andcovered on all sides except the side toward the interior of the machine,means for discharging a current of dust-laden air into the interior ofthe machine, an open-topped trough on the interior of the machine, oneof said end pieces having an eccentric groove provided with an enlargedportion near its top, a shaft mounted in said trough and projectingthrough the end pieces, a wiper on one end of said shaft, a screw on theshaft carrying the contents of the trough to a point of discharge, achute open at its top and bottom for each cloth-bearing filtersection, ashaft for supporting each chute, said shaft having its bearings in therotatable rims, a lever on the end of each of said shafts, a roller oneach of said levers to enter the eccentric groove and another roller oneach of said levers to be engaged by the wiper on the screw-shaft, meansfor rotating the screw; shaft and flexible strips connecting the edgesof each chute with the edges of the adjacent filtersection, and meansfor automatically turning said levers on the shafts of the chutes from adownwardly to an upwardly inclined position when on their upwardmovement. Des Moines, Iowa, January 16, 1902.

JOHN H. WALSH. Witnesses:

S. N. GroRnnN, GEORGE HOULISTON.

